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UV Laser Rayleigh Scattering을 이용한 가스 성분의 농도 및 온도 분포 계측에 관한 실험적 연구
진성호(S.H.Jin),남기중(G.J.Nam),김희산(H.S.Kim),장래각(N.K.Chang),박승한(S.H.Park),깅웅(U.Kim),박경석(K.S.Park),김경수(G.S.Kim) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
Rayleigh Scattering Cross Sections(σ_i) of various gases and the temperature distributions of premixed Propane/O₂ flame are measured by high power KrF(248nm) Excimer laser and ICCD camera. Results show that σ_i of O₂ and Propane(C₃H_8) gases agree well in the 5% error range. but σ_i of H₂ has the more or less difference from the calculated value by other groups. This is attributed to the low RS signal of H₂ to noise level(SIN ratio).<br/> The temperature distributions of flame range out between 300K in the air and about 2000K in the burned area. In this temperature range, our system has the about 250K temperature resolution. Because low RS signals in the reaction area with high temperature are affected highly by noises, temperature uncertainty of this area is relatively high to another part of flame.<br/> Experimental results show that UV Rayleigh Scattering can be used for the measurement of mixing ratios of mixed gases and the temperature distributions of flame. Especially. this technique can be applied for the measurement of the mixing ratios of air/fuel before the ignition and the flame structure after the ignition inside the Engine.<br/>
엑시머 레이저를 이용한 층류 비예혼합 수소화염에서의 2차원적 온도 및 농도계측
김군홍(G.H.Kim),김용모(Y.M.Kim),진성호(S.H.Jin),김세원(S.W.Kim),김경수(G.S.Kim) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
Rayleigh scattering and planar laser induced predissociative fluorescence are employed for capturing in two-dimensional images of temperature and species concentration in a laminar nonpremixed flame of a diluted hydrogen jet. Rayleigh scattering cross-sections are experimentally obtained at 248nm. Using the spectroscopic data. Fluorescence spectrum of OH and Hot O₂ are captured and two-dimensional images of the hydrogen flame field are successfully visualized by a intensified CCD camera.<br/>
자성유체의 Benard 유동에서 열전달특성에 관한 수치적 연구
박정우(J.W. Park),진성호(S.H. Jin),전철호(L.S. Seo),서이수(C.H. Jun),김영삼(Y.S. Kim) 한국자기학회 2003 韓國磁氣學會誌 Vol.13 No.1
This study deals with the Benard flow of magnetic fluids in a rectangular cavity. The ratio of height to length of the cavity is 1:4 and the bottom of the cavity is assumed to be a heating face while the other sides are to be cooling faces. When magnetic field was equally impressed, considering the internal rotation of the elementary ferromagnetic particle, we found the following result from the numerical analysis of the GSMAC algorithm applied to the equations for the magnetic fluid. Benard flow was controled by the intensity and the direction of magnetic fields, and a critical point was appeared when the magnetic field near H=-7000 was applied.
정동화(D.H.Jung),마상용(S.Y.Ma),진성호(S.H.Jin),장석형(S.H.Jang),박경석(K.S.Park) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
It is important at the vehicle planning stage to be able to estimate the amount of heat that maybe released to the engine coolant in the cooling system. In this study, author measured coolant temperature of some parts and flow rate which we necessary to analysis of thermal flow in an engine cooling system. Therefore, author determined parameters necessary for the optimum condition of cooling control to keep the heat engine performance.<br/>